I also traded my 650 for a M6 and I have the RPi GT full (sections 1, 2 & 3) and the sound is great. A little loud but I love it. you can also get the street version which is about 20% quieter.

Plus factor, you will add HP power to your bottom line.

90% of M6 owners that I know have the RPi for the performance and sound,

The only wat to judge is to listen to all in person as the videos really does not help, it sounds good but in person it will sound totally different.

Jitoo

03-02-2012 08:05 AM

BTW I see you are in CA and there a lot of M6^ ers out there.

You will get more real info on M6's on www.m5board.com and then go to the M6 section and you will get a lot of great info there

Jackson1019

06-12-2012 09:58 AM

Just ordered my Eisenmann race exhaust round tips. To me it came down to the Eisenmann or the Tubi Rumore exhaust. The Tubi was just to expensive i think their website was selling them for around $5,400! The Eisenmann only cost me $2,500 and I have always loved the sound of them so I went with that.